Catalytic composite and process for mercaptan sweetening
This patent describes an improvement in a method for treating a sour petroleum distillate containing mercaptans comprising contacting the distillate in the presence of an oxidizing agent with a catalytic composite effective in oxidizing the mercaptans to disulfides. The improvement comprises a catalytic composite comprising a metal chelate and an onium compound selected from the group consisting of phosphonium, arsonium, stibonium, oxonium and sulfonium compounds dispersed on an adsorbent support. The onium compound having the formula (R{sup {prime}}(R){sub y}M){sup {plus}}X{sup {minus}} wherein R is a hydrocarbon radical containing up to about 20 carbon atoms and selected from the group consisting of alkyl, cycloalkyl, aryl, alkaryl and aralkyl, R{sup {prime}} is a straight chain alkyl radical containing from about 5 to about 20 carbon atoms, M is phosphorous, arsenic, antimony, oxygen or sulfur, X is hydroxide or a hallide selected from the group consisting of chlorine, bromine and iodine, y is 2 when M is oxygen of sulfur and y is 3 when M is phosphorous, arsenic or antimony.
- Assignee:
- UOP, Des Plaines, IL
- Patent Number(s):
- US 4897180; A
- Application Number:
- PPN: US 7303197A
- OSTI ID:
- 7017198
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ANTIMONY COMPOUNDS
ARSENIC COMPOUNDS
BROMINE
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORINE
COMPOSITE MATERIALS
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HYDROGEN COMPOUNDS
HYDROXIDES
IODINE
MATERIALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXIDIZERS
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PHOSPHORUS COMPOUNDS
RADICALS
SULFUR CONTENT
THIOLS